Hi - We had WPPSI-III and WJ-III at 4.4 months - We had the testing as it was a requirement to receive early entry into private school for gifted kids. We had WIAT-II at 4.10 to make sure the grade placement for the school was going to be correct.

Because of the young age for the achievement tests, we were not able to get most composite scores for his age. Because of this, I would recommend waiting since the tests were not inexpensive to administer.